Raymond, William Galt, 1859-1926, Raymond, William Galt, 1859-1926. cre · New York, J. Wiley & sons, inc · leaf 87
lls, or straight endwalls, are either sloped down with the embankment or are steppeddown. If of masonry, they are usually stepped; if of concrete,they are perhaps generally sloped. When built of masonry the abutments are of random rangemasonry with rubble backing; are not less than 3 feet thick…
Railroad engineering
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